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Mashcka [7]
3 years ago
13

When classified, all living things have

Chemistry
1 answer:
topjm [15]3 years ago
3 0

Answer: 2 or more cells

Explanation:

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Look at sample problem 19.10 in the 8th ed Silberberg book. Write the Ksp expression. Find the concentrations of the ions you ne
777dan777 [17]

Answer:

Explanation:

From the information given:

CaF_2 \to Ca^{2+} + 2F^-

Ksp = 3.2 \times 10^{-11}

no of moles of Ca^{2+} = 0.01 L × 0.0010 mol/L

no of moles of Ca^{2+} = 1 \times 10^{-5} \ mol

no of moles of F^- = 0.01 L × 0.00010 mol/L

no of moles of F^- = 1 \times 10^{-6}\ mol

Total volume = 0.02 L

[Ca^{2+}}] = \dfrac{1\times10^{-5} \ mol}{0.02 \ L} \\ \\  \\  \[[Ca^{2+}}] = 0.0005 \ mol/L

[F^{-}] = \dfrac{(1\times 10^{-6} \ mol)}{0.02 \ L}

[F^{-}] = 5 \times 10^{-5}  \ mol/L

Q = [Ca^{2+}][F^-]^2 \\ \\ Q = 0.0005 \times (5\times 10^{-5})^2 \\ \\ Q = 1.25 \times 10^{-12}

Since Q<ksp, then there will no be any precipitation of CaF2

3 0
3 years ago
The temperature and number of moles of a gas are held constant. Which of the following is true for the pressure of the gas?
Taya2010 [7]

Answer:

Pressure is inversely proportional to the volume of gas.

Explanation:

According to Boyle's law,

The volume of given amount of gas is inversely proportional to the pressure applied on gas at constant volume and number of moles of gas.

Mathematical expression:

P ∝ 1/ V

P = K/V

PV = K

when volume is changed from V1 to V2 and pressure from P1 to P2 then expression will be.

P1V1 = K         P2V2 = K

P1V1 = P2V2

3 0
3 years ago
TRUE or FALSE
andriy [413]

Answer:

1. true

2. false

3. true

Explanation:

5 0
2 years ago
Differentiate between speed and velocity
Leokris [45]

Explanation:

Speed and velocity are both used to describe the motion of a body. But there are differences between the two terms.

  • Velocity is the rate of change of displacement with time. It is mathematically expressed below:

                      Velocity = \frac{displacement}{time taken}

 The unit of velocity is m/s or km/hr.

Velocity is a vector quantity that shows magnitude and direction.

  • Speed is the rate of change of distance with time. It is concerned with the total length of path a body moves.

                  Speed = \frac{Distance }{time taken}

  It has the same unit as velocity

It is a scalar quantity that has only magnitude.

learn more:

Velocity brainly.com/question/10883914

#learnwithBrainly

7 0
3 years ago
Sudden heavy rains cause what kind of conditions that can then cause flooding
MissTica

Constant and heavy raining can cause the drains to overflow and build up in large puddles.

I have no idea if this is what you were looking for or not.

6 0
3 years ago
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